Air conditioning means



A g- 1934- F. A. WHITELEY 1,969,829

AIR CONDITIONING MEANS Original Filed July 9, 1950 3 Sheets-Sheet 1 Inventor.- F/f W/u'tele Aug. 14, 1934. F. W L Y 1,969,829

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Original Filed July 9, 1930 3 Sheets-Sheet 5 In V612 for. Whiteley Patented Aug. 14, 1934 UNITED STATES PATENT OFFICE Application July 9, 1930, Serial No. 466,689 Renewed December 13, 1933 18 Claims.

My invention relates to improvements in airconditioning means, particularly air-conditioning means for the rooms of residences or other rooms in which people live and where the condition of the air may conduce to comfort and health.

In most climates, probably all climates of the United States, Canada and Europe, there are times during the year when air must be conditioned by adding heat thereto, and very many appliances and systems have been devised for conditioning air by heating it. In more recent years it has been discovered that many of the heating systems employed have the effect of producing an excessively dry atmosphere. It is further found that such a dry atmosphere not only increasesthe cost of heating because its evapcrating effect makes the air seem cooler than it actually is, but is a positive detriment to health, 20 as well as to woodwork and furniture in the inside of buildings. 80' the conditioning of air by adding moisture thereto has grown to be of importance and various means have been devised for so conditioning air by the addition of moisture, and some of these means operate as they well may in conjunction with the heating or heat conditioning devices. Further, it is true that the heat-conditioning appliances invariably set the air in motion and carry up with it more or less dust and dirt, and so a third conditioning factor of importance is the removal of such particles of dust and dirt from the air within the various types of living rooms wherethe air is to be conditioned.

Most air-conditioning to the present time has had to do with the conditioning of air in cold weather. However, in many climates, perhaps most climates, there are periods during the summer months or warm season months when great discomfort is experienced from excessive heat. And it has been proposed to condition the air in summertime by removing heat therefrom or cooling. Moisture conditioning under such circum-- stances is desirable also, but in exactly the reverse order of moisture conditioning in cold weather. While in cold weather it is almost always desirable to add moisture to the air being heated, in warm weather it is equally desirable to extract moisture, and most of the cooling or air-conditioning means for warm weather have had the effect of adding moisture for the reason that they depend upon water filters of various sorts and kinds whereby the air is subjected to free water and naturally its water vapor content is increased. The desirability of air conditioning for the removal of dust and dirt will, of course, be the same in hot weather as in cold weather.

Temperature conditioning, either for heating the air in winter or cooling the air in summer presents essentially the same problem, and the means for effecting it function in the same way.

In each case a heat exchanger is employed. Where heating is desired the hot heat exchanger is a solid surface-radiators, furnace walls, stoves and the like-and the exchange of heat is 05 from these heated surfaces to the air. In the cooling of air, the reverse operation takes place, the heat exchanger then being cold surfaces of one sort or another and the exchange of hea being from air to such cold surfaces.

My invention has for its object to provide means for conditioning the air both for raising its temperature and adding moisture for Winter or cold weather conditioning and for lowering its temperature and taking out its moisture for sum- 76 mer or hot weather conditioning. To accomplish this I provide on the one hand novel means for heating the air, moistening the air, cleaning the dust from the air, and delivering it to the various living rooms in a warm, cleanand moist 80 condition; and, on the other hand, equally novel means for cooling the air, taking the moisture out of the air, cleaning the air and for delivering. cool, dry, clean air to the rooms to be conditioned, said respective sets of means being interchangeably operable through the same air-receiving and air-delivery chambers and through the same air-intake and air-delivery pipes running to the rooms to be conditioned.

My application is in some respects a carrying forward and continuation of the invention described and claimed in co-pending application filed'March 15, 1928, Serial Number 261,775 new Patent No. 1,846,292, issued Feb. 23, 1932. It is more particularly the object of my present invention to provide the heating means from a gas supply or other fluid fuel burner, and to control the movements of the air across and about the heat chamber so as to withdraw from the heating medium a maximum amount of the heat generated and effect a peculiarly economical and satisfactory transfer of heat.

It is a further object of my invention to provide air-cleaning means located in the path of 105 travel of the air being treated such that the air will be caused to whirl therein above a water surface and be caused to impinge upon said water surface for the collection of dust particles thereby, said impingement being effected by a reno 7 versal of the direction of movement of the air immediately above said water surface.

It is a further object of my invention to provide a fan or blower for driving the air through the system and causing it to reach an air-distributing or air-delivery chamber from which the conditioned air is distributed to all of the rooms of the residence, said fan or blower operating in an air-receiving chamber to which the air is caused to return, the air-moistening and cleaning means being in the path of circulation of the air moved by said blower or fan.

It is a further and highly important object of my invention to provide an air-cooling chamber which is normally separate and distinct from the air passageways employed when the air is being heated, but which is provided with means whereby said air-cooling chamber may be placed in the circuit of the passageways used for air heating, or of some of them, so that air moved by the fan or blower will be caused to pass through the cooling chamber and back to the air-distributing or air-delivery chamber from which said cooled air is distributed to the various rooms in exactly the same way and by the same instrumentalities as the heated air is so delivered. The air-cooling chamber is further provided with air-cleaning and moisture-removing means, and the means for throwing said air-cooling chamber into the circuit of the air passageways is such as to simultaneously throw out of operation the air moistening and cleaning means employed when the air is being conditioned by being heated.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and its novel features are more particularly pointed out in the claims.

In the drawings illustrating an application of my invention in one form,-

Fig. 1 is a longitudinal sectional view of an air-conditioner embodying the features of my invention. Fig. 2 is a sectional elevation on line 2-2 of Fig. 1 viewed in the direction of the arrows. Fig. 3 is a sectional elevation on line 3--3 of Fig. I viewed in the direction'of the arrows. Fig. 4 is a plan view in section taken on line 44 of Fig. 1 viewed in the direction of the arrows with some parts broken away. Fig. 5 is a partial plan view in section taken on line 55 of Fig. 1 viewed in the direction of the arrows. Fig. 6 is a sectional plan view taken on line 6-6 of Fig. I viewed in the direction of the arrows.

An inner casing 10 is provided which completely encloses, except as hereinafter recited, a heat chamber 11 of irregular cross-section but of a height equal to or greater than its greatest depth. Extending across the heat chamber 10 are a multiplicity of tubes 12 angularly disposed in said heat chamber above a series of burners 13 preferably for burning gas, although any fluid fuel burner is within the scope of my invention. The burners 13 are connected with the customary Bunsen supply tubes 14 which'lead to a manifold 15 supplied with gas from a main 16 an d controlled by an electromagnetic valve 17 of will-known construction. A pilot light 18, also of well-known automatic construction, receives gas through a supply line 19 from the main 16.

The pipes 14 pass upwardly through an opening 20 in the bottom wall or floor of the heat chamber 11, as clearly shown in Fig. 1. This opening 20 leads downwardly into a secondary air-admission chamber as shown in dotted lines in Fig. 4 adjacent said opening 20 As before stated, a series of pipes 12 extend across the heat chamber 11, preferably being obliquely extended above the burners 13. These pipes are in a circuit of air passageways connecting at their lower ends with an air-inlet chamber 28 of general vertical character formed by an outer casing 29, which air-inlet chamber connects at itstop with an air passageway 30 formed by a casing 31 extending parallel with and spaced from the casing 32 forming in combination with the heat chamber top 33 an airdelivery chamber 34.

The air-inlet chamber 28 is provided with means for heating the air preliminarily before it goes through the tubes 12 across the heat chamber and to the other conditioning instrumentalities hereinafter described. The gases of combustion from the burners 13 are thrown ofif vertically and rise through the battery of pipes 12 to the upper part of the heat chamber 11 where they reverberate in said chamber and are caused to return downwardly across the battery of pipes a second time to the transverse trough 35 below the lower ends of said obliquely-disposed pipe tubes 12, from which said gases go to two smoke pipes 36 and 37 which extend from the trough 35 into the heat chamber 28 through a dividing partition-38 formed with a central aperture 39 wherein is mounted a fan or blower 40 as shown in Figs. 1 and 4. The pipes 36 and 37 in the form shown in Fig. 2 connect through riser pipes 41 and 42 with a transverse pipe 43 of larger diameter and through a central connection 44 with another transverse pipe 45 which may be of still larger diameter; and again through a connector pipe 46 with a third transverse pipe 47 which may go through the casing to the stack, as indicated at 48 in Fig. 2. The transverse pipe 45 is preferably provided with a baflle 49 whereby the gases of combustion are caused to move from the center 44 to the end of the pipe and thence back to the connector pipe 46, as clearly indicated in Fig. 2. Air returns 63, which lead to the various rooms to be conditioned, discharge directly into the top of the air-intake chamber 28 or into the air passageway 30 above the air-delivery chamber 34, being positively moved therein by the fan or blower 40. Such air is caused to travel into the air chamber 28 and down over the pipes 43, 45 and 47, as in Fig. 1, whereby the coldest air to be treated contacts with the coldest heat exchange surfaces and practically all of the heat contained in the gases of combustion is transferred to the incoming air. As a safeguard against possible accumulation of gas in the upper part of the heat chamber and its inadvertent explosion, a safety valve 67 is provided, leading directly to the stack, as shown in Fig. 1. This safety valve is of such a nature that it will normally remain closed but can vertical plate or separator 156 which has the effect of more certainly causing the gases of combustion to travel through the battery of pipes 12 and into the top of the heat chamber there to reverberate before returning through the pipes to the trough 35 and passing thereafter through the heat exchangers in the intake chamber 28 and to the stack. A door 157 of usual construction opens on the outside casing 29 through an enclosing casing 158 which spans one of the vertical air passages 84.

Pipes 68 lead to the heat-delivery chamber 34 extending acrossthe air-intake passageway 30. These pipes 68 are insulated as indicated at 69 in Fig. 1, and the top 32 of the air-delivery chamber 34 is also insulated as indicated at 70. It is the purpose of this arrangement not to take heat from the heat-delivery chamber-34other than such as would escape normally to the basement or the room where the air conditioner is located. Such heat, however, as does escape and would escape any way from the top of the air-delivery chamber is thus trapped and carried to the airintake chamber. In this manner very little heat will be lost in the basement where the air conditioner is located, an exceedingly desirable condition as practically always with hot air furnaces a basement is much overheated.

The air from the tubes 12 is discharged into an air-transfer chamber from which it passes to a pair of annular passageways 76 formed within similar cylinders 7'? extending vertically from the air transfer chamber 75 to a point close to the top of water pans 78 positioned at the bottom of the air conditioner and registering below the bottoms of said cylinders '77 as clearly shown in Figs. 1 and 3, said pans being adapted to be withdrawn laterally as shown at '79 of Fig. 3.

concentrically positioned within the cylinders 76 are other cylinders 80 Figs. 3 and 4 which open through apertures 81 extending across the annular passageways 76 into a chamber 82 which discharges into a passageway 83 below the heat chamber 11 from which the air rises through vertical legs or passageways 84 along the sides of the heat chamber to the air-delivery chamber 34. At a point in the annular passageway '76 below the openings 81 from the inner cylinders 80 is formed a multiplicity of overlapping vanes, as indicated at 85 in Figs. 4 and 5. These overlapping vanes somewhat restrict the air passing down through the annular passageways and cause it to whirl insaid annular passageways and while so whirling to impinge upon the surface 86 of the water in the pans 78. Not only will the air whirl above said water surfaces and impinge upon them downwardly, but it will be caused to reverse in direction and pass upwardly through the cylinders 80 to the openings 81 and. thence through 82 downwardly to the passageways which lead to the air-delivery chamber. The effect of this whirling and change of direction is two-fold. In the first place it will cause the particles of dirt and dust carried by the air to be thrown upon the water surface, which will retain them and clean the air of such dust and dirt. In the second place it will cause this air which has been hightly heated to sweep the water surface and withdraw moisture therefrom. This withdrawal will be rapid because the air is taken into the air conditioner at room temperature and reaches the water surface at its maximum temperature, which will have the effect of making it very dry, and that, taken with the movement of the'air upon the water surface, will pick up water very rapidly.

If the entire water surfaces in the pans remain exposed at all times, undoubtedly the amount of water vapor would often be in excess of the amount desired to maintain a proper conditionof humidity in the rooms of the residences. To

meet this condition I provide means for varying the amount of water surface exposed to the whirling current of air, namely, a flat conical member 87 which in its lowermost position will be entirely submerged, leaving a complete water surface exposed as shown in Fig. 3. When, however, the cone is lifted it will quite rapidly change the amount of water surface from the maximum amount, or one hundred per cent, to any smaller amount up to practically nothing. The cones may be lifted by manually-operable means and should be so lifted at times when it is desired to withdraw them from within 'the pans to take the pans out for cleaning. This manual operation may conveniently be effected by providing a lifter lug 90 secured to the apex of the cone 87, which lifter lug will pass through a keeper 91 extended across and secured to the inner tube 80. To the end of the lifter lug a cord or chain 92 is secured which passes about a shaft 93 operated by a hand crank 94 by means of which the cone member may be lifted or lowered by hand, as

shown in Fig. 3. Or, through any source of power,

the rock-shaft 111 and extending through the casing and through the openings 81 to a point near the center of the cylinders 80 are a pair of lever arms 113 which lever arms are connected at their ends by cords 114 with the lifter lugs 90 secured to the apices of the cone 87, which by these means may be lifted or lowered. The above arrangement is highly effective not only to maintain a uniform condition of humidity, but also keep the dust and particles of dirt cleaned from the air which is circulating through the rooms.

The air cleaning and moistening devices above described are employed when my invention is used for conditioning the air by heating in colder months. In warmer weather where it is desirable to condition the air by withdrawing moisture and cooling the air, the above described devices are put out of action and others are brought into action. The means for accomplishing this are well shown in Figs. 1, 5, and 6. At the back of the transfer chamber '75 is located a closure door 116, and at the back of the heat-delivery chamair-cooling device. Similarly, when the door 117 is turned into the position shown in dotted lines, it opens the air-delivery chamber to the air-cooling devices.

This latter device as shown and described comprises a central tank 118 designed to be filled with brine or any other effective heat-transferring medium which will not freeze at any ordinary temperature. The lower part of the tank 118 is traversed by a multiplicity of tubes 119 of relatively quite large size. These tubes open to the air-transfer passageway '75 and are shut off from the air-deliverychamber 34 by a partition 12a. It follows that the air moving from the transfer passageway must pass through the tubes 119 and in entering those tubes they pass through a vane structure 120 which causes the air to whirl in tubes 119 it enters a chamber 121 from which it may pass back to the air-delivery chamber 34 by means of passages surrounding the tank 118, as clearly shown in Fig. 6, and other tubular passages 122 passing through the tank back to the air-delivery chamber 34. I

The tank 118 and all of the passages through it are downwardly disposed, as clearly shown in Fig. 1. The warmer, moist air in going through these passageways will be suddenly cooled and will precipitate its moisture upon the walls of the various passageways. The walls of the tubes or cylinders 119 will become wet and the whirling air will throw dust particles to these surfaces which will be trapped in the water thereof. All of the water accumulating passes to troughs 123, from which it wastes through a pipe system 124 'to the sewer, thus greatly drying the air before it goes back to the rooms.

Within the tank and coiling about the various passageways therein is an extended copper tube 125 which communicates through extensions 126, 127 with a compressor diagrammatically shown at 128, the compressor being of any well-known type for effecting compression and liquefication of some gas, the expansion of which in the tubes 125 takes heat from the brine mixture and produces the cooling effect desired. The compressor 128 is mounted in a closed chamber 129 with a stack 130 going to outdoors. A ventilator or draft opening 131 at the bottom of the stack admits air into it and a draft of air is forced in through a pipe 132 directly upon the coils of the condenser, the pipe 132 connecting by a branch head 133 through an opening 134 with transfer chamber '75. In this way the efficiency of the compressor is greatly increased and the heat transferred from the'brine is discharged out-ofdoors. The tank and its accessories is supported at the rear end with the heat-conditioner portion by legs 135 which may be of pipe or any desired construction.

The advantages of my conditioning apparatus will be obvious. When used for air-conditioning in winter or colder weather by supplying clean, heated, moist air it provides an extremely efficient and useful means for the purpose, and one wherein the heat units are so completely exchanged to the air going to the rooms that the system will prove economical enough to justify the employment of the more expensive type of fuel such as gas, which, at the same time, is in every way more satisfactory. The important part of the air-conditioning which consists in moistening the air will be carried on automatically with perfect safeguard against over-moistening.

Finally, with identically the same means for moving the air from and to the rooms the appliance for cooling and drying the air may be put into operation in summer or hot weather periods. This will not interfere with the use of the appa ratus for heating. At all times during cool spells in the summer months, or in the spring and fall, the cooling means may be thrown out of operation and the heating means be put in operation. And always, whichever is used, the heating means or the cooling means, the same devices for drawing the air from the various rooms and for redistributing it to the rooms are used. In either case the same returns and intake chamber, distributing pipes and delivery chamber are employed, and the change is effected merely by the shifting of valves. In either case dust and dirt the tubes 119. After the air passes through the is removed from the .air and the removal is effected by the same impelling force (the blower), which circulates the air.

I claim:

1. Ari air conditioner comprising a casing formed to provide an air-inlet chamber, a heat chamber, an air-delivery chamber above the heat chamber, an air-transfer chamber at the end of the heat chamber below and directly contiguous to the air-delivery chamber and an air-cooling chamber at the end of both the air-delivery chamber and the air-transfer chamber, contiguous to and adapted to open into each, means for forcing air through the air-transfer chamber and around the heat chamber to the air-delivery chamber without passing through the air-cooling chamber, and means for simultaneously cutting off the flow of air around the heat chamber and opening it to pass through the air-cooling chamber to the air-delivery chamber.

2. An air conditioner comprising a casing formed to provide an air-inlet chamber, a heat chamber, an air-delivery chamber above the heat chamber, an air-transfer chamber at the end of the heat chamber and below the air-delivery chamber and an air-cooling chamber at the end of both the air-delivery chamber and the airtransfer chamber, means for forcing air through the air-transfer chamber and around the heat chamber to the air-delivery chamber without passing through the air-cooling chamber, a partition closing communication of the air-cooling chamber with both the air-delivery chamber and the air-transfer chamber, and doors in said partition, one of said doors movable to cut off the flow of air around the heat chamber and open it to pass through the air-cooling chamber and the other door opening the air-cooling chamber to the air-delivery chamber.

3. An air conditioner comprising a casing formed to provide an air-inlet chamber, a heat chamber, an air-delivery chamber above the heat chamber, an air-transfer chamber at the end of the heat chamber and below the air-delivery chamber and an air-cooling chamber at the end of both the air-delivery chamber and the airtransfer chamber, said air-cooling chamber being divided into two interiorly connected compartments, means for forcing air through the airtransfer chamber and around the heat chamber to the air delivery chamber without passing through the air-cooling chamber, a partition closing the air-cooling chamber from both the air-transfer chamber and the air-delivery chamber, a door in said partition opening into the air-transfer chamber and adapted to be operated to cut off flow of air around the heat chamber and to permit the air to pass into one compartment of the air-cooling chamber, and another door in said partition adapted to open the second compartment of the air-cooling chamber to the air-delivery chamber. 7

4. An air conditioner comprising a casing formed to provide a heat chamber, an air-delivery chamber above the heat chamber, an airtransfer chamber, and an air-cooling chamber adapted to be put in communication with both the air-delivery chamber and the air-transfer chamber, said air-cooling chamber being divided into two interiorly-connected compartments, means for forcing air through the air-transfer chamber and around the heat chamber to the air-delivery chamber without passing through the air-cooling chamber, a partition closing one compartment of the air-cooling chamber from the air-transfer chamber, a door in said partition 5 opening into the air-transfer chamber and adapted to be operated to cut off flow of air around the heat chamber and permit the air to pass into that compartment of the air-cooling chamber, a second partition normally closing the second compartment of the air-cooling chamber from the air-delivery chamber, and a door in said second compartment adaptedto open the second compartment of the air-cooling chamber to permit air to pass into the air-delivery chamber.

5. An air conditioner comprising a casing formed to provide a heat chamber, an air-delivery chamber and a multiplicity of delivery pipes connected therewith for distributing the air to the rooms of the building, an air-intake chamber provided with a' corresponding number of return pipes for returning the air from the rooms being conditioned, an air-transfer chamber having three passages opening thereinto, two of which are always open and one always closed; an aircooling chamber, means adjacent the heat chamber for adding moisture to the air when it is driven around the heat chamber, means in the air-cooling chamber for taking moisture out of the air when it passes through the air-cooling chamber,'and means for causing all of the air to travel through the air-transfer chamber to the air-delivery chamber and means in the transfer chamber for opening the closed passage and closing the open passage into said transfer chamber.

6. An air conditioner comprising a casing having means in one part thereof for heating air and means in another part for cooling air, means associated with the heating means for removing dust and dirt from the air, other means associated with the cooling means for removing dust and dirt from the air, means for moving the air, and controllable means for causing it to move only about the heat chamber or only through the cooling chamber.

7. An air conditioner comprising a casing havingmeans in one part thereof for heating air and means in another part for cooling air, means associated with the heating means for operating upon the air to remove dust and dirt therefrom and to add moisture thereto, other means associated with the cooling means operative upon the air to remove dust and dirt therefrom and to take water from the air, means for moving the air, and controllable means for causing it to move only about the heat chamber or only through the cooling chamber.

8. An air conditioner comprising a hot air furnace embodying an air inlet chamber and an air delivery chamber provided with air distributing and return pipes for conducting the air to and from the rooms. of a building, means in the furnace for heating the air, means forming an air cooling chamber adjacent and attached directly to the furnace, means for moving the air through the furnace and to the distributing system, and means for causing the air to move from the furnace through the air cooling chamber and back to the distribution system of the furnace.

9. An air conditioner comprising a hot air furnace embodying an air inlet chamber and an air delivery chamber provided with air distributing and return pipes for conducting the air to and from the rooms of a building, means in the furnace for heating the air, means for moving the air through the furnace and to the distributing system, conduits in the furnace including an air transfer chamber, said air delivery chamber lying above the heating means and the transfer chamber, means forming an air cooling chamber having one wall coterminus with a wall of the air delivery chamber and the air transfer chamber, and valves in said wall operable to cause all of the air to move through the air cooling chamber to the air delivery chamber.

10. An air-conditioner comprising a hot air furnace having separate air inlet and air delivery chambers w th air delivery and return pipes connected with the respective chambers, an air-cooling chamber and air-cooling means therein, a fire-chamber between the air-inlet and air cooling chambers, a blower for moving the air, and means between the fire chamber and the air-cooling chamber for controlling the flow of air so all of it will flow past and about the outside of the fire chamber and none of it through the air cooling chamber to the air-delivery chamber or alternatively so all the air will flow through the air-cooling chamber to the air-delivery chamber and none of it will flow about the outside of the heat chamber.

12. An air-conditioner comprising a hot-air furnace formed with a heat-chamber, an airtransfer chamber and an air-delivery chamber, with means for moving air through the heat chamber and to the air-transfer chamber, an air-cooling chamber, separated passages formed to independently connect the air-transfer chamber with the air-delivery chamber through the air-cooling chamber and also around and outside of the heat-chamber, and a valve device operative in either of two positions to close one or the other of said passages and open the other passage.

13. An air-conditioner comprising a hot-air furnace formed with a heat-chamber, an airtransfer chamber and an air-delivery chamber, with means for moving air through the heat chamber and to the air-transfer chamber, an air-cooling chamber, separated passages formed to independently connect the air-transfer chamber and also around and outside of the heatchamber, and a door movable to either of two operative positions'to alternatively open one and close the other of said passages.

14. An air-conditioner comprising an air-inlet chamber, an air delivery chamber, a heat chamber, an air-cooling chamber, independent airpassages outside and about the heat chamber and through and from the air-cooling chamber, respectively, to the air-delivery chamber, means for moving the air, and means for selectively opening one and closing the other of said sets of passageways to said air-movement.

15. An air-conditioner comprising an air-inlet chamber, an air delivery chamber, a heat chamber, an air-cooling chamber, independent airpassages outside and about the heat chamber and through and from the air-cooling chamber, respectively, to the air-delivery chamber. means for moving the air, and a pair of swinging doors for selectively opening oneand closing the other of said sets of passages to said air-movement.

16. An air-conditioner comprising a. unitary casing formed with an air-inlet chamber in one portion and an air-delivery chamber in another portion, air-heating means and air-cooling means within the casing and near together, with an air-transfer chamber between them, a blower for moving the air from the air-inlet chamber to the air-delivery chamber through the airtransfer chamber, and a member movable in the air-transfer chamber adapted in one position to direct the air to be blown over the air-heating means and in another position to be blown over the air-cooling means.

1'7. An air-conditioner comprising a heatchamber, a cooling chamber and an air-transfer chamber between them, said air-transfer chamber having an air-inlet opening and other openings leading therefrom to the cooling chamber and about the heat-chamber, and a valve member in the air-transfer chamber operable to simultaneously open one and close the other of said last named openings.

18. An air-conditioner, comprising a heatchamber, a cooling chamber and an air-transfer chamber between them, said air-transfer chamber having an air-inlet opening through one side, an opening into the cooling chamber through the opposite side and an opening in the floor thereof to pass air about the heat chamber, and a swinging door in the air-transfer chamber operable'in one position to close the cooling-chamber passage and leave open the heat chamber passage and in another position to close the heat chamber passage and leave open the cooling-chamber passage.

FRANK A. WHITELEY. 

